Cuban bast vs hibiscus

Cuban bast and hibiscus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cuban bast	Yes	No	No	No
hibiscus	Yes	No	No	No

As nouns, hibiscus is a hypernym of Cuban bast; that is, hibiscus is a word with a broader meaning than Cuban bast:

Cuban bast: erect forest tree of Cuba and Jamaica having variably hairy leaves and orange-yellow or orange-red flowers; yields a moderately dense timber for cabinetwork and gunstocks
hibiscus: any plant of the genus Hibiscus

Cuban bast (noun)	hibiscus (noun)
erect forest tree of Cuba and Jamaica having variably hairy leaves and orange-yellow or orange-red flowers; yields a moderately dense timber for cabinetwork and gunstocks	any plant of the genus Hibiscus